6609987 has 6 divisors (see below), whose sum is σ = 9547772. Its totient is φ = 4406652.

The previous prime is 6609973. The next prime is 6609989. The reversal of 6609987 is 7899066.

It is not a de Polignac number, because 6609987 - 2⁴ = 6609971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6609989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367213 + ... + 367230.

Almost surely, 2^6609987 is an apocalyptic number.

6609987 is a deficient number, since it is larger than the sum of its proper divisors (2937785).

6609987 is a wasteful number, since it uses less digits than its factorization.

6609987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734449 (or 734446 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 6609987 is about 2570.9894982283. The cubic root of 6609987 is about 187.6723109325.

The spelling of 6609987 in words is "six million, six hundred nine thousand, nine hundred eighty-seven".